fully-grown BrE
full-grown AmE

Your baby is now fully grown and ready for the world.

However, this would not happen if the body was already fully grown.

I would like to put a fully grown male in with her.

The kid is fully grown by three years of age.

The average mass of a fully grown male is 350g.

She's now fully grown and changing the lives of her own people as well.

But even when she's fully grown she won't be much over two feet tall.

Up front the fully grown dog sat looking straight ahead.

He was the only fully grown man on the island and couldn't take more than two steps without someone holding him up.

The largest species is about 1.5 feet when fully grown.